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2 SheetsSheet 1.

(No Model.)

J P AROHDEAOON AXL'ELESS SPROOKET FOR BIGYGLES. I

Patented June '7, 1898.

fnvenor Q/LwOCMCAH/L Ozforny (No Model.) 2 Sheets-Sheet 2.

J. P. AROHDEAGON. AXLELBSS SPROGKET FOR BIGYGLES.

No 605,214. PatentedJune, '7, 1898'.

wz'inesses: Inventor.-

cfltaTney UNiTE- STATES PATENT.

FFICE.

JOHN P. AEonDEAooN, oE BOSTON, MASsAoHUSErTs, ASSIGNOR or ONE- I-IALF TOFRANK WHITCOMB, on SAME PLAoE.

AXLELESS SPROCKET FOR BlC-YCLES.

SPECIFICATION forming part of Letters Patent No. 605,214, dated June 7,1898.

Application filed September 23, 1897. Serial No. 652,698. (No model.)

a citizen of the United States, residing at Boston, in the county ofSufiolk and State of Massachusetts, have invented a new and usefulAxleless Sprocket for Bicycles and Velocipedes, of which the following,taken in connection with the accompanying drawings, is a specification.

My invention relates to an axleless sprocket; and itconsists in thenovel features which will be described hereinafter and particularlypointed out in the claims at the end of the specification.

In the drawings, Figure 1 is a side elevation showing a sprocket withbox, cone, and cranks, illustrating my invention. Fig. 2 is a section online 2 2 of Fig. 1. Fig. 3 is a detail plan of one of the crowns. Fig. 4is a side and end elevation of the block which is employed in attachingthe crowns to the box.

The sprocket-wheel 9, instead of having a central axle, is mountedbetween two rotary side members on transverse supports which connectsaid rotary members, and the sprocket rotates with said members. Therotary side members whichIhave shown consist of ringcones 1 2, mountedon rods 3 3, &c., and rotating on ball-bearings 21 in ring-boxes '17.

The cones have ears 4, which are perforated to receive the rods. Saidrods are screwthreaded at their ends and provided at each end withclamp-nuts 5, 6, 7, 8, 41, and 42. The cars of cone 2 are clampedagainst the shoulders 51 on said rods. The earsof cone 1 are clampedagainst the threaded collars 52 on said rods. Said collars, as well asthe nuts, can be moved to allow adjustment of the bearings. Thesprocket-wheel'9 is clamped against the shoulders 11 on the rods3 by thenuts 10. I have shown the supporting-rods as six in number; but theexact number is sprocket of the rear wheel.

not material. The sprocket is mounted a little to one side of themiddleof the space becentral axle of a sprocket whose diameter is, say,four inches and the length of the crank is six inches, under my form ofconstruction the length of the crank will be about two inches, but withthe same radius of rotation as before.

While the rotary side members which I have described consist ofring-cones with ballbearings, I do not intend to limit myself to thatparticular construction." I claim,broadly, an axleless'sprocket mountedon transverse supports between two rotary side members Whichrotate withsaid sprocket.

i The front stay-post 22 has at itslower end a crown 23, which rests onthe ends of the ears 24, which project outwardly from the boxes 17. Across-bolt 25 passes through holes in these ears and also passes throughthe blocks 26, which are set one between each pair of ears. These blockshave threaded pins 27, which pass through holes in the crown 23, andhave nuts 28, by which the crown is securely clamped and the post heldfirmly in position.

The seat-post is formed with a crow similar to that of the frontstay-post and is secured inth'e same way by projecting ears on theboxes, cross-bolts 25, and blocks 26.

The rear forks 32 have a cross-bar 33 con necting them at the ends, saidcross-bar rest ing on the ends of ears 24, as in the case of theseat-post and front stay-post, or dovetailed into the said cross-bar, asshown in the draw ings. A square-sided bolt 34 passes through the earsand is secured by nuts 35 on the ends.

Bolts 36, having nuts 37 on their ends,

pass through the cross-bar 33 and the bolt 34 fixed ring-boxes combinedwith the cones to hold the ball-bearings, and bolts which conneet thecones, in combination with an axleless sprocket supported on saidconnecting- 5 bolts, substantially as described.

In testimony whereof I have signed my name to this specification, in thepresence of two subscribing witnesses, 011 this 20th day of September,A. D. 1897.

JOHN P; AROHDEACON.

Witnesses:

WILLIAM A. COPELAND, EDITH J. ANDERSON.

